"Brand Adult Product" vaginal contraction is a contraction of female mouth muscles, improve skills and sexy. Through training, the vagina can shrink very tight, the easiest way is to practice anal contraction. Vaginal sphincter and anal sphincter governed by the same nerve. Therefore, a contraction of the anal sphincter, must be accompanied by vaginal sphincter contraction. "Brand Adult Product" force enhancement and reduction to practice, not a single male is happy to discuss, through the contraction of the vaginal opening to improve the sensitivity of response to stimuli, help to strengthen the women themselves sexy. Rotary motion of a penis into the vagina after using waist circle skills, "Brand Adult Product" is best suited for women lower movement. Do rotary motion, the two close together, which helps stimulate the penis vagina. Movement is a diverse mix motor skills, acquire women cooperative movement is an important prerequisite for mixing, otherwise, you can not achieve colorful sex life.